Read the passage and answer the question by choose (A, B, C or D)
Nowadays, people are destroying rain forests of the earth seriously. It is ( 21)……………….. that every year 100,000 (22)……………….. kilometers of rain forests are destroyed for supply of wood paper and fuel as well as for the residence and (23)………………..  land. Rain forests are very  important for the world’s climate. They receive the rainfall on the earth and produce a large amount of the world’s oxygen. Destroying rain forests,(24)………………..  , is destroying our environment. Saving rain forests is a(n) (25)………………..  problem. Nations need cooperation to save rain forests, if not, it will be late.
21. A. exhausted                 B. pleasure             C. interesting                     D. estimated
22. A. square                      B. cross                 C. round                               D. heart
23. A. planting                   B. field                       C. farming                         D. rice
24. A. moreover                 B. however                  C. so                              D. therefore
25. A. national                   B. international            C. world wide                    D. world